Glass ceramic applied to rear cover of mobile terminal for 5G communication and reinforced glass ceramic

A technology of glass-ceramics and mobile terminals, applied in the field of glass-ceramics, can solve problems such as being unable to adapt to the back cover of 5G mobile terminals, and achieve the effects of low magnetic loss, high mechanical properties, and low loss

Active Publication Date: 2018-10-12
GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The glass-ceramic materials disclosed in the above-mentioned patents cannot meet the requirements of the back cover of 5G mobile terminals in terms of flexural strength, surface hardness, and ion diffusion depth.

Method used

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  • Glass ceramic applied to rear cover of mobile terminal for 5G communication and reinforced glass ceramic

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of glass ceramics, in terms of mass percentage of oxide, the composition of the glass ceramics is SiO 2 50%, Al 2 o 3 12%, Na 2 O 13%, K 2 O 2%, Li 2 O 3%, MgO 7%, TiO 2 6%, Eu 2 o 3 1%, P 2 o 5 3%, Fe 2 o 3 2%, Sb 2 o 3 1%. The glass-ceramic in this example is a high-strength and low-magnetic-loss basic glass-ceramic for the back cover of a 5G communication mobile terminal, with a microhardness of 7.6GPa, a four-point bending strength of 216Mpa, and a fracture toughness of K IC Up to 0.9MPa·mm 0.5 ; For 7GHz high-frequency communication electromagnetic wave loss coefficient is 14dB / cm, magnetic susceptibility is 3.8×10 -9 m 3 / mol, the magnetic moment is 4.8×10 -24 J / T.

Embodiment 2

[0045] A kind of glass ceramics, in terms of mass percentage of oxide, the composition of the glass ceramics is SiO 2 70%, Al 2 o 3 10%, Na 2 O 8%, K 2 O 2%, MgO 2%, TiO 2 4%, ZnO 1%, Eu 2 o 3 1%, P 2 o 5 1%, Fe 2 o 3 1%. The glass-ceramic of this embodiment can be used as the base glass-ceramic of high strength and low magnetic loss for the back cover of a 5G communication mobile terminal, with a microhardness of 5.6GPa, a four-point bending strength of 163Mpa, and a fracture toughness of K IC Up to 0.6MPa·mm 0.5 ; For 7GHz high-frequency communication electromagnetic wave loss coefficient is 18dB / cm, magnetic susceptibility is 3.5×10 -9 m 3 / mol, the magnetic moment is 5.6×10 -24 J / T.

Embodiment 3

[0047] A kind of glass ceramics, in terms of mass percentage of oxide, the composition of the glass ceramics is SiO 2 45%, Al 2 o 3 12%, Na 2 O 10%, K 2 O 1.5%, MgO 2.5%, ZrO 2 10%, Li 2 O 3%, TiO 2 5%, ZnO 2%, Eu 2 o 3 3%, P 2 o 5 1%, Fe 2 o 3 4%, Y 2 o 3 1%. The glass-ceramic of this embodiment can be used as the base glass-ceramic of high strength and low magnetic loss for the back cover of the 5G communication mobile terminal, with a microhardness of 6.5GPa, a four-point bending strength of 235Mpa, and a fracture toughness of K IC Up to 0.9MPa·mm 0.5 ; For 7GHz high-frequency communication electromagnetic wave loss coefficient is 10dB / cm, magnetic susceptibility is 2.1×10 -8 m 3 / mol, the magnetic moment is 2.1×10 -23 J / T.

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Abstract

The invention discloses glass ceramic applied to a rear cover of a mobile terminal for 5G communication and reinforced glass ceramic and belongs to the technical field of glass ceramics. The glass ceramic is prepared from components in percentage by mass of oxides as follows: 45%-75% of SiO2, 10%-25% of Al2O3, 8%-20% of Na2O, 1%-4% of K2O, 0-5% of Li2O, 0-20% of MgO, 0-10% of ZnO, 1%-8% of TiO2, 0-20% of ZrO2, 0-3% of Eu2O3, 0-5% of P2O5, 0-3% of Sb2O3 and 0-5% of Fe2O3. The glass ceramic has the properties of high strength and low magnetic loss, and the performance of the reinforced glass ceramic is further improved.

Description

technical field [0001] The invention belongs to the technical field of glass-ceramics, and relates to a glass-ceramics applied to the back cover of a 5G communication mobile terminal. The glass-ceramics of the invention has the properties of high strength, high hardness, impact resistance, and low magnetic consumption. Background technique [0002] With the development of 5G technology and wireless charging technology, higher requirements are put forward for the back cover materials used in mobile terminals, because the metal back cover will affect the millimeter wave transmission of 5G communication and hinder wireless charging, so it can no longer adapt to future mobile terminals. development needs. The mainstream of the current market is glass back cover and ceramic back cover. Although the performance of the ceramic back cover is relatively good, it faces difficulties such as difficult processing, single color, and low yield. [0003] At present, most of the glass back...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00
CPCC03C10/0018
Inventor 田培静郑伟宏袁坚彭志钢
Owner GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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